Why isn’t a 100% protein food possible.

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I’m sure most nutrition-conscious people are aware of the 1g protein/10 calorie ratio for determining whether a food is high protein. To my knowledge the highest protein foods & supplements out there have a 2/10 ratio, but theoretically shouldn’t a 2.5/10 be possible, since 1g of protein generally contains 4 calories (I am aware this is a rounded up figure that can vary, but that only furthers my inquiry). What is the scientific reason for this? Is it impossible for a molecule to fully consist of proteins, so the remaining 2ish calories have to consist of other macronutrients, or is it something else?

In: Chemistry

5 Answers

Anonymous 0 Comments

You can probably get a lab to send you some pure amino acids if you want, but what would be the point? It wouldn’t be palatable, your stomach probably wouldn’t find it very pleasant to eat, and you can only handle so much protein before your kidneys decide you are Having a Very Bad Day, and Would You Please Sit Down For A While So Your Kidneys Figure Out What the F— You Just Ate.

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